fix .mtg set regex
fix .mtg set regex

andyeff/skybot,olslash/skybot,jmgao/skybot,Jeebeevee/DouweBot,cmarguel/skybot,isislab/botbot,callumhogsden/ausbot,parkrrr/skybot,df-5/skybot,ddwo/nhl-bot,Teino1978-Corp/Teino1978-Corp-skybot,rmmh/skybot,TeamPeggle/ppp-helpdesk,crisisking/skybot,craisins/nascarbot,Jeebeevee/DouweBot_JJ15,craisins/wh2kbot,elitan/mybot,SophosBlitz/glacon